Rollup merge of #138175 - sam-mccall:binobj, r=nnethercote

Support rmeta inputs for --crate-type=bin --emit=obj

This already works for --emit=metadata, but is possible anytime we're not linking.

Tests:
- `rmeta_bin` checks we're not changing --emit=link (already passes)
- `rmeta_bin-pass` tests the new behavior for --emit=obj (would fail today) and also --emit=metadata which isn't changing

compiler/rustc_metadata/src/dependency_format.rs

@@ -84,7 +84,7 @@ pub(crate) fn calculate(tcx: TyCtxt<'_>) -> Dependencies {
 fn calculate_type(tcx: TyCtxt<'_>, ty: CrateType) -> DependencyList {
     let sess = &tcx.sess;
 
-    if !sess.opts.output_types.should_codegen() {
+    if !sess.opts.output_types.should_link() {
         return IndexVec::new();
     }